/* * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * @test * @bug 6585904 * @run testng CheckedIdentityMap * @summary Checked collections with underlying maps with identity comparisons */ import java.util.*; import static java.util.Collections.*; import static org.testng.Assert.assertEquals; import static org.testng.Assert.assertNotEquals; import org.testng.annotations.Test; public class CheckedIdentityMap { @Test public void testHashCode() { Map m1 = checkedMap( new IdentityHashMap(), Integer.class, Integer.class); Map m2 = checkedMap( new IdentityHashMap(), Integer.class, Integer.class); // NB: these are unique instances. Compare vs. Integer.valueOf(1) m1.put(new Integer(1), new Integer(1)); m2.put(new Integer(1), new Integer(1)); Map.Entry e1 = m1.entrySet().iterator().next(); Map.Entry e2 = m2.entrySet().iterator().next(); assertNotEquals(e1, e2); assertEquals(e1.hashCode(), hashCode(e1)); assertEquals(e2.hashCode(), hashCode(e2)); } static int hashCode(Map.Entry e) { return (System.identityHashCode(e.getKey()) ^ System.identityHashCode(e.getValue())); } }